A developer who nearly finished a prototype feature leaves mid-iteration. What should the project manager do?

In an agile environment, teams are cross-functional and self-organizing. When a team member leaves, the most effective first step is to assess if existing team members can absorb the work. This maintains team autonomy and leverages existing knowledge. Requesting an external hire is a lengthy process and not an immediate solution. Moving the deliverable to a later iteration might delay critical features and impact the product roadmap. Engaging stakeholders to review the iteration process is a reactive measure after a solution has been explored, not a primary response to a team member's departure.